The environment minister, Jan Szyszko, said on Monday that operations would continue and the government was preparing a response to the court, to be sent by Friday.

Polish television station TVN24 showed footage of machines felling trees in the Białowieża forest, which has been listed as a Unesco world heritage site.

Primeval forest must lose Unesco protection, says Poland

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Greenpeace’s Polish spokesman said: “The felling is continuing, even if it is at a lower intensity.”

On Saturday, a cameraman trying to establish if the felling operations were continuing was assaulted by employees of one of the logging companies, an incident that was condemned on Monday by the authorities.

The EU took Poland to court on 13 July, arguing that the Białowieża operations were destroying a forest that boasts unique plant and animal life, including the continent’s largest mammal, the European bison.

The Polish government said it had authorised the logging, which began in May last year, to contain damage caused by a spruce bark beetle infestation and to fight the risk of forest fires.

But scientists, ecologists and the EU have protested and activists allege the logging is a cover for commercial cutting of protected old-growth forests.

The forest, which straddles Poland’s eastern border with Belarus, includes one of the largest surviving parts of the primeval forest that covered the European plain 10,000 years ago.

The Unesco committee overseeing the world heritage sites project has joined the EU in calling on Poland to halt the logging operations.